If emission factors from other international data sources are used, the expert review team should, in the review report, justify and document the reason for their use; Extrapolation (interpolation) of the national emission factor, implied emission factor or other inventory parameter from earlier years as reported in the common reporting format (CRF) or national inventory report if the factor in question was prepared in accordance with the IPCC good practice guidance; Average implied emission factor or other inventory parameter from a cluster of countries obtained as described in paragraphs 31-34 below.
b) Valores extrapolados (interpolados) del factor de emisión nacional, el factor de emisión implícito u otro parámetro del inventario de años anteriores comunicados en el formulario común para los informes (FCI) o en el informe del inventario nacional, si el factor en cuestión se preparó ateniéndose a la orientación del IPCC sobre las buenas prácticas.